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| author | Alexey Moiseytsev <himeraster@gmail.com> | 2011-11-21 13:35:25 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-26 16:34:22 -0500 |
| commit | 0884d7aa24e15e72b3c07f7da910a13bb7df3592 (patch) | |
| tree | 0b7257890d1e5a960f3205f94ab0a4d628ce7c3a /net | |
| parent | 83b98fb46ff136945f9d06a9bf6e6aae2ffc37b3 (diff) | |
| download | lwn-0884d7aa24e15e72b3c07f7da910a13bb7df3592.tar.gz lwn-0884d7aa24e15e72b3c07f7da910a13bb7df3592.zip | |
AF_UNIX: Fix poll blocking problem when reading from a stream socket
poll() call may be blocked by concurrent reading from the same stream
socket.
Signed-off-by: Alexey Moiseytsev <himeraster@gmail.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/unix/af_unix.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 466fbcc5cf77..b595a3d8679f 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -1957,6 +1957,7 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock, if ((UNIXCB(skb).pid != siocb->scm->pid) || (UNIXCB(skb).cred != siocb->scm->cred)) { skb_queue_head(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); break; } } else { @@ -1974,6 +1975,7 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock, chunk = min_t(unsigned int, skb->len, size); if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) { skb_queue_head(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); if (copied == 0) copied = -EFAULT; break; @@ -1991,6 +1993,7 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock, /* put the skb back if we didn't use it up.. */ if (skb->len) { skb_queue_head(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); break; } @@ -2006,6 +2009,7 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock, /* put message back and return */ skb_queue_head(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); break; } } while (size); |